摘要
鲁甸M_S6.5地震造成了严重的人员伤亡与工程结构破坏,选取记录到该地震强震动的迤车强震台和龙头山强震台。利用随机有限断层法,合成了这2个台的地震动时程,并利用土层等效线性化法,分析了龙头山强震台的场地效应。结果表明,龙头山强震台场地存在较强的非线性效应,对0.08~5 s周期范围内的地震动存在较强的放大作用。结合龙头山镇的建筑物与场地情况,分析认为地震动的场地效应是造成该区域严重震害的重要原因之一。
Ludian earthquake caused serious casualties and structural damages. The maximum peak acceleration of Longtoushan site reaches 948. 5 gal and its is about 4. 4 km far from the epicenter. We choose Longtoushan site and Yiche site as target stations to simulate ground motion by using stochastic finite fault method. Based on synthetic ground motion,we also analyzed the site effect of Longtoushan station in the earthquake. The result shows that there was a site soil nonlinear behavior in Longtoushan site. Besides,there was a strong amplification of ground motion in the period of 0. 08 ～ 5 s. In further discussion,we analyzed the site factors,which caused much more damage in the Ludian earthquake.
作者
魏勇
崔建文
王秋良
沈雨忆
WEI Yong;CUI Jianwen;WANG Qiuliang;SHEN Yuyi(Key laboratory of Institute of Seismology, CEA, Wuhan 430071, Hubei;Yunnan Earthquake Agency, Kunming 650224, Yunnan, China)
出处
《地震研究》
CSCD
北大核心
2018年第1期32-37,共6页
Journal of Seismological Research
基金
国家自然科学基金面上项目(41572354)资助
关键词
鲁甸地震
随机有限断层法
等效线性化
场地效应
地震动
Ludian earthquake
stochastic finite fault method
equivalent linearization
site effect
ground motion
